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Concrete release agent prepared from chloroacetic acid modified konjac glucomannan (KGM)

A technology of konjac glucomannan and concrete release agent, which is applied in the field of concrete release agent, can solve the problems such as hindering the adhesion of concrete surface and limitation of application scope, and achieves the effects of high cost performance and convenient use.

Inactive Publication Date: 2017-03-15
大连市铭源全科技开发有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Paraffin wax release agent can be used on steel, wood formwork and concrete pedestal. When the paraffin wax content is high, it often leaves paraffin wax residue on the concrete surface, which hinders the bonding of the concrete surface, so its application range is limited

Method used

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  • Concrete release agent prepared from chloroacetic acid modified konjac glucomannan (KGM)

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Embodiment Construction

[0018] The present invention will be further explained below in conjunction with specific examples.

[0019] A concrete release agent prepared by chloroacetic acid modified konjac glucomannan, KGM and chloroacetic acid undergo a bimolecular nucleophilic substitution reaction in a sodium hydroxide alkaline environment, and the reaction equation is as follows:

[0020] ;

[0021] ;

[0022] Among them: R—sugar residue in KGM.

[0023] Its preparation method is: take KGM purified powder into a beaker filled with 60-75% alcohol solution, add chloroacetic acid, adjust the pH value to 8-9, stir and react at 60 °C for 3-4 hours, and dry to obtain To modify KGM particles, add water and stir to dissolve at a certain temperature, and filter out the sol to obtain a modified solution. Wherein, the molar ratio of KGM purified powder to chloroacetic acid is 1:1.

[0024] The performance advantages of the modified KGM release agent of the present invention compared with traditional r...

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Abstract

The invention discloses a concrete release agent prepared from chloroacetic acid modified konjac glucomannan (KGM). KGM and chloroacetic acid have a dimolecular nucleophilic substitution reaction in a sodium hydroxide alkaline environment. A preparation method of the concrete release agent includes the steps that KGM purified powder is placed into a beaker containing 60-75% of an alcoholic solution, chloroacetic acid is added, the pH value is adjusted to 8-9, stirring is conducted at 60 DEG C for a reaction for 3-4h, and modified KGM particles are obtained after drying; and water is added for stirring and dissolving at a certain temperature, and a modified solution is obtained after sol is filtered out. The concrete release agent has the beneficial effects that the concrete release agent is a water-based release agent, is nontoxic and free of pollution, can be sprayed and smeared, and is convenient to use; and the release agent can be degraded automatically within a certain period after smearing, a formwork does not need to be cleaned, time and labor are saved, and the cost performance is high.

Description

technical field [0001] The invention relates to a concrete release agent, in particular to a concrete release agent prepared from chloroacetic acid modified konjac glucomannan. Background technique [0002] Concrete prefabricated components or prefabricated products, such as blocks, slabs, beams, piers, dams, bridges, etc., must use formwork or molds during the pouring process. In order to make the hardened concrete easy to demould without damaging the formwork, a layer of release agent is often applied to the formwork or mold. For a long time, so-called liquid soaps, which are saponified from engine oil, waste engine oil, emulsified engine oil, or animal and vegetable oils and inferior oils, are often used as release agents in China. The main types of release agents are as follows: [0003] 1. Pure oil. Various vegetable oils, animal oils and mineral oils can be used as release agents. However, mineral oil is mostly used at present. That is, various light lubricating o...

Claims

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Application Information

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IPC IPC(8): B28B7/38C10M145/40C08B37/02C10N40/36
CPCB28B7/384B28B7/388C08B37/009C10M145/40C10M2209/12C10N2040/36
Inventor 宫振鑫
Owner 大连市铭源全科技开发有限公司
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